Anyone built a infrared thermometer?

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As the topic says...

I am interested in building IR-thermometers for use as tire temperature monitoring on my trackday car. Would need to have roughly 1C precision from 0-120C. A narrow sensing of ~5-10 degrees would also be needed to fit 3 sensors on each tire.

Have done a bit of searching but find it hard to find any "hands-on" material. Was hoping to find readymade sensor boards, but i`m struggling to find anything at all really.

I know you could buy IR "guns" at a very low cost, so there must (at least should) be some sensors who do the job easy?

So, any ideas or experience??

Kim

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Found one :D

Melexis MLX90614 seems quite right really ;)

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That's the one I was going to suggest.
Have not used it, but when I was looking for IR-sensor chips that was the only reasonable hit I came up with.
There are different models, some with narrow angle of detection.

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Hi Lennart, thanks for answering.

Yes, it might be the only one, but it does also seem to be quite perfect, 3.3V, 5V, high voltage compatibility and with varying FOV. I`ll see if i buy one and try it out.

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If you can read the temp on all 4 tires, have 4 red-yellow-green leds on the dash, and you light up the hot one in red. Might be a life saver for housewives in SUVs, and a moneymaker for the guy that gets it on the market?

Imagecraft compiler user

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I have been thinking about that, problem is that on normal driving i dont think the tires will get dangerously warm. Could maybe combine it with a tire-pressure measurement system to give early warning if you hit a nail or something.

On track i will use it to check tyre pressure and camber adjustment to find optimum settings.

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There are many more tire failures on hot days than others, on the highways. Could sell the devices to automotive electronics garages (car starter & audio installers), motorhome dealerships, and perhaps long-haul truck drivers. :)

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hmm, i did not know that. But then again, i cant say that road temperatures get very hot in my area.

Only tire temp experience i have was on the last trackday. After ~35km the tires were about 60-65 degrees.

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For the average road going car and trucks there are already wireless pressure and temperature monitoring devices available.

For racing, where tyre temp monitoring really comes into play is when you change tyres during a race - by monitoring the temps you can have the next set of tyres set up beforehand to cope with the current track conditions. For camber adjustment, just looking at the tyres after a run gives a reasonable idea of the temps across the tyre and how well it is working. Nevertheless, if the device is cheap enough, the extra information it gives might justify its existence.